Duplicating apparatus.



No- 830,969. PATENTBD SEPT. 11, 1906. MOION J. D. CARTER.

DUPLIGATING APPARATUS.

APPLICATION nun MAY 25. 1905.

WITNESSES: 7 E T 1 I www m My; xm BY ATTORNEY p with this I employ a barsecured to the duview of a portion of a duplicator-drum, showsheet ofwaxed porous paper alone be emtration in the arranging of the sheet, allas hereinafter set forth in detail.

ED TA ES PATEL orrr o.

McION JAMES DOUGLAS GABTERQOF LONDON. ENGLAND, ASSIGNOR TO A- B. DLCICCOMPANY, OF CHICAGO, ILLINOIS, A CORPORATIQN OF ILLINOIS.

. DU PLICATI N G No. 830,969. Specification of Application filed May25,1905. Seria11i'o.262,2 85.

APPARATUS.

Letters Patent. Patented Sept. 11, 1906,

To all wit/mt if ma-Z! concern:

Be it known that I, MoIoN JAMES DOUG- LAS CARTER, a subject of the Kingof Great Britain, andia resident of London, England, have invented acertain new and useful Impr'ovement in Duplicating Apparatus, of whichthe following is a specification.

The invention relates generally "to that type of duplicating apparatusin which is employed a waxed stencil-sheet through the interstices inwhich ink is passed forthe purpose of imprinting upon a subjacentimpression-sheet.

i The object of the invention is to provide for readily and easilyattaching the ste'ncil sheet to the duplicating-machine. To this end Iprovide the forward end thereof, or of a part to which the waxed sheetis secured, with a pocket formed by means of a rearward fold, preferablywith closed ends, and coacting plicator-drum and having a part adaptedto be received within such fold. In connection with such means ofattachment I prefer also to employ means for securing accurate regis- Inthe drawings, Figure 1 is a perspective ing the attachment bar securedthereto. Fig. 2 is a similar view of the stencilsheet, and Fig. 3 is asectional view of said sheet on the line 3 3, Fig. 2.

The term stencil-sheet is used herein broadly and without reference towhether a ployed or such a sheet associated with another stronger sheet,such as a backing-sheet or a type-protecting tissue-sheet, or both.

For the purpose of the present disclosure I have shown a backing-sheet Aof some strength, to which is secured along the line b a waxedstencil-sheet B. The latter may, if desired, be covered with a thintype-protecting sheet (not shown) of the character known in the art. Inthe forward edge of the stenoil-sheet (in the present instance of thebacking A) I form a fold a by turning such edge backward. Also, ifdesired, the side edges adjacent to such forward edge may be turned overlaterally u on the fold, as shown at a a, to formsuch f0 d into apocket.

duplicator-drum. This may have the angular strengthening-flange c, ifdesired. In order to secure theadvancing edge of the stencil-sheet inposition, the same may be laid over the bar C and drawn rearwardly,whereupon said bar will enter the fpld or pocket at such edge and firmlyhold the same in position. The rearward end of said sheet may be securedin any suitable manner, or, if desired, the ink below such sheet may berelied upon to keep it in position on the drum.

For the purpose of securing accurate registration I may, if desired,provide the bar C with studs 0 0, adapted tocoact with slots a (1 formedin the stencil-sheet. The latter maybe of any desired shape andrelatively to the edge of the sheet; but I prefer to make them of suchdimensions and arrangement relatively to the fold in the forward edge ofthe stencil-sl1eet as that the studs 0 a will coact therewith only whensaid fold is in en-- gaging position relatively to the bar C. Whetherthis practice he observed or not the coaction of the studs and slots orother openings properly positions the stencil-sheet laterally upon thedrum.

If desired, the bar C may be cut away at c and the forward (folded) endof the stencilsheet may he provided with a clip 0 holding the two partsof the fold together and preventing injury to such fold either whileadjusting the stencil-sheet upon the drum or previously thereto.

I-claim as new therein, and desire to secure by Letters Patent, is asfollows:

1 In duplicating apparatus, a stencil-sheet having its forward endfolded downward and and openings in the sheet rearward of'said fold,substantially as described.

2. In duplicatingapparatus, a stencil-sheet having its forward endfolded downward and rearward, the ends of the fold being closed,substantially as described.

3. In duplicating apparatus, the combination with a drum having across-bar, of a stencil-sheet having its forward end folded downward andrearward, and means closing to engage said fold, substantially asdescribed. i

C designates a bar extending between and connected at its ends to theheads D D of the g 4. In duplicating a paratus, the combination of astencil-sheet aving its forward edge Having now described my invention,what rearward, the ends of the fold being closed,

the ends of said fold, said bar being adapted folded downward andrearward, the extreme edge thereof being unsecured to-the body of thesheet, means closing the ends of said fold, a drum, and a cross-barthereon having a tongue adapted to enter the pocket formed by said foldto secure the stencil-sheet to the drum, substantially as described.

5. In duplicating a paratus, the eombma ted tongue adapted to enter thepocket formed by said fold to secure the stencilsheet to the drum,substantially as described.

edge thereof being unsecured to the bodv of the sheet, said sheet havingslots therein, means closing the ends of said fold, a drum, a cross-barthereon having a tongue adapted to enter the pocket formed by said foldto secure the stencil-sheet to the drum, and studs on said cross-baradapted to enter-the slots in said sheet. to position the sheetrelatively to the drum, substantially as described.

This specification signed and witnessed this 10th day of May, 1905. tMUION JAMES DOUGLAS CARTER.

Witnesses: i

II. D. JAMESON, F. 11. RAND.

